<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        //生成器就是一个特殊的函数，可以进行异步编程
        function* gen() {
            // console.log('hello generator');
            console.log(111);
            yield '一只没有耳朵';
            console.log(222);
            yield '一只没有尾巴';
            console.log(333);
            yield '真奇怪';
            console.log(444);
        }
        let iterator = gen();
        iterator.next();
        iterator.next();
        iterator.next();
        iterator.next();

        //遍历
        for (let v of gen()) {
            console.log(v);
        }

    </script>
</body>

</html>